Double sided faces: Blender export problem - 3D Modeling in X-Plane - X- Plane.Org Forum
UE4 – Creating two sided material effects using the TwoSidedSign node – Oded Maoz Erell's CG Log
Trying to get a simple double-sided material in URP, but the plane backface looks different, what should I do ? (left is back, right is front) : r/Unity3D
blender two-sided planes do not show up as double-sided in three.js · Issue #584 · mrdoob/three.js · GitHub